Merge branch 'fc/remote-hg' (early part)

* 'fc/remote-hg' (early part): remote-hg: update bookmarks when pulling remote-hg: don't push fake 'master' bookmark remote-hg: disable forced push by default remote-hg: fix new branch creation remote-hg: add new get_config_bool() helper remote-hg: enable track-branches in hg-git mode remote-hg: get rid of unused exception checks remote-hg: trivial cleanups